| | 1 | work in progres ... |
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| | 3 | = How to … implement a new VRP ProblemInstance = |
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| | 5 | == Goals == |
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| | 7 | One way to implement a new VRP variant is by implementing a new {{{VRPProblemInstance}}}. This is a suitable possibility if the VRP variant requires additional model data. A {{{VRPProblemInstance}}} is responsible for storing all information about a VRP instance like coordinates, distances, demands, etc. By extending a {{{VRPProblemInstance}}} it is possible to add additional data as additional constraints or flexibility to a VRP variant. It is also necessary to implement a new {{{VRPEvaluator}}} (see [wiki:UsersHowtosImplementANewVRPEvaluator How to ... implement a new VRP Evaluator]) to interpret the new data. |
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| | 9 | In addition to the new {{{VRPProblemInstance}}} a new ''parser'' for reading the additional data from a file is required. In order to integrate the new parser into HeuristicLab a {{{VRPInstanceProvider}}} and other components are also required. |
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| | 11 | After this tutorial you will be able to implement you own VRP variants that require additional model data. You will also have a basic understanding of the concepts and architecture concerning the {{{VRPProblemInstance}}}, the {{{VRPInstanceProvider}}} and related components. |
